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Poang Fasteners stands out as a dependable manufacturer and supplier of Duplex Steel Nuts S31803, providing fastening solutions that blend remarkable mechanical strength with top-notch corrosion resistance. Crafted from duplex stainless steel grade S31803, these nuts boast a well-balanced microstructure of austenite and ferrite, ensuring they’re durable and high-performing even in tough environments. With their precise threading and accurate dimensions, Duplex Steel S31803 nuts guarantee secure fastening in critical applications. Poang Fasteners is committed to delivering products that adhere to global quality standards, making these nuts a go-to choice in Vietnam and beyond for demanding industrial needs.
Duplex Steel Nuts S31803 are mainly made up of chromium, nickel, molybdenum, and nitrogen, which give them outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. Their unique dual-phase microstructure offers nearly double the strength of regular austenitic stainless steels while still maintaining excellent toughness and fatigue resistance. On a mechanical level, these nuts showcase high tensile and yield strength, along with stability under varying temperatures and pressures. This impressive combination of features ensures that Duplex Steel S31803 nuts can be relied upon in both structural and marine applications where standard fasteners might not hold up.
| S31803 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
| S31803 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
| Specifications | ASTM A479 / ASME SA479 |
| Standards | DIN, ASTM, BS and all International Standards |
| Length | 3 mm to 200 mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | Hex Head Bolts, Square Bolts, U bolts, Eyebolts, T bolt, Hex Bolt, Lag Bolts, Countersunk Bolts, Hex Head nuts, Square nuts, Locknuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Duplex Steel Nuts S31803 are widely used in various demanding industries due to their high strength and corrosion resistance. Common applications include oil and gas exploration, chemical processing, and marine environments, where durability under harsh conditions is essential. They are also utilized in construction, aerospace, and power generation sectors, particularly in structures and machinery exposed to extreme stress and corrosive elements. Their robust performance ensures long-term reliability and minimal maintenance in critical applications.
These nuts are widely utilized in industries where secure and corrosion-resistant fastening is crucial. You’ll often find them in offshore oil and gas platforms, chemical processing plants, desalination systems, and marine engineering projects, where resistance to chloride-induced corrosion is vital. Additionally, they’re employed in the pulp and paper industry, heat exchangers, structural construction, and power generation equipment. Their ability to endure extreme conditions while maintaining strength and stability makes Duplex Steel S31803 nuts a trusted choice for heavy-duty engineering and industrial fastening applications around the globe.
Poang Fasteners is a leading manufacturer and supplier of high-quality fasteners in Da Nang, Vietnam, with over 8 years of experience serving global industries.
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